@Kamerat, I've heard that after the bios has been upgraded, even downgrading it will still give the cpu error you're receiving so unfortunately you may be out of luck sorry. You could always try though because it can't do any harm provided you know what your doing bios wise which I'm guessing you …

Is there any way to downgrade or modify the BIOS on the boards not officially supporting Coppermines? Mine ran fine with Coppermine before upgrading the BIOS, but it didn't recognized it. After upgrade it just halted with a message that the CPU wasn't supported.

Are you shure that your PSU is 100% OK?

Thank you Vetz! :) I think i will choose only hardware released in stores at 1999. I got my 3D Blaster Annihilator Pro for christmas '99, that's a GeForce DDR card. ;) I had to replace my Asus P2L97 with a P3B-F because of this card, the P2L97 had it's own 3,3V regulator that couldn't supply the …